cifs: call cifs_update_eof with i_lock held

cifs_update_eof has the potential to be racy if multiple threads are
trying to modify it at the same time. Protect modifications of the
server_eof value with the inode->i_lock.

Signed-off-by: Jeff Layton <jlayton@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index d7e39b0de5b0..4ff6313f0a91 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -626,7 +626,7 @@ struct cifsInodeInfo {
         bool delete_pending;            /* DELETE_ON_CLOSE is set */
         bool invalid_mapping;           /* pagecache is invalid */
         unsigned long time;             /* jiffies of last update of inode */
-        u64  server_eof;                /* current file size on server */
+        u64  server_eof;                /* current file size on server -- protected by i_lock */
         u64  uniqueid;                  /* server inode number */
         u64  createtime;                /* creation time on server */
 #ifdef CONFIG_CIFS_FSCACHE